You can add notes related to each employee as needed like career goals, performance updates, etc. You can also tag a specific person using the @ mention feature if you want them to be alerted of your note.
Notes can easily be added by clicking on the 3 dots next to the person's name and then clicking on Notes. A side panel will appear, open to the "Notes" tab.
You can also access notes on the Person's Dashboard - in the top right menu.